Nano-injection mobile phone five-painted five baking technology

Nano-molding technology is a combination of metal and plastic nanotechnology. After the metal surface is nano-treated, the plastic is injected directly onto the metal surface to allow the metal and plastic to be integrally formed. This can not only take into account the appearance of the metal, but also Simplify product component design and make products lighter, thinner, shorter, and smaller.

Faced with a brand-new process, Dongguan Yuanya Chemical Co., Ltd. developed a set of 5 coatings after a series of research and experiments according to the needs of the market for the weakness of paint and dents on the back cover (metal + plastic) of mobile phones. The technological scheme can effectively solve the adhesion of the surface of the material (metal + plastic) to make it have the luster and touch of the metal, high strength, scratch resistance and scratch resistance. After spraying with this method, the model can be tested at 100, high and low temperature, and wear-resistant. The program has been successfully applied to mobile phones such as Meizu, OPPO, and Huawei.

Coating application:

Applied to the surface of nano-injection-molded mobile phone casings, it is applied to five layers of coating to improve the appearance of the surface of the substrate and to prolong the service life of the products, thus protecting and decorating the substrate. With: light, high temperature, beautiful, metallic luster ornate nature. In order to attach paint to both metal and plastic, and to ensure the consistency of color, the best paint was selected first, and a special primer was used on the base material to improve adhesion. Then spray the primer twice and once in the paint plus a PU finish paint, baking separately after each spray, which is the way the back cover of the five-painted and five-bake process to ensure the quality of the phone shell.

Features:

With metallic luster and touch, excellent performance, such as boiled, abrasion resistant, salt spray resistant, chemical resistance testing. At the same time, the defects generated by the injection molding can be covered to prevent dents. Matte is used in the last layer of PU paint. This way, while keeping the product fashionable, it keeps the appearance unrestricted, and on the other hand it increases the friction between the mobile phone and the hand, greatly reducing the possibility of hand-slip. Sex.

Construction process:

1: material inspection; check each system

2: Alcohol wipe cleans the substrate surface; bake 80°C/h

3: a primer 1 (spray viscosity: 7.5 "-8.5", spray thickness: 10μm-15μm, 60 °C × 10-15 minutes)

4: Primer 2 (spray viscosity: 14"-17", spray thickness: 60μm-80μm, 60°C × 60 minutes)

5: Baking at 80°C for 2h; appearance surface grinding; ultrasonic cleaning for 30min

6: Baking 80 °C / h; alcohol wipe; baking 80 °C / 30min

7: Three primers 3 (spray viscosity: 8.5 "-9.5", spray thickness: 22μm-30μm, 60 °C × 10-15 minutes)

8: Four coats of paint (spray viscosity: 8.5"-9.5", spraying thickness: 5μm-7μm, 60°C × 10-15 minutes)

9: Five-coat topcoat (spray viscosity: 8.5"-9.5", spray thickness: 18μm-24μm, 60°C × 30-40 minutes)

10: Bake 90°C/30min

11: Printing (1H); Baking 90°C/5H

12: Detection

Tips:

1. The frequency of ultrasonic cleaning is as low as possible. Too much adjustment will affect the adhesion of the product;

2. The product must be run in the water frame after grinding by the robot to prevent it from being dried on the surface of the product after it has been dried.